The Insider Ledger

Weekly intelligence from public SEC filings

Nothing on this site is investment advice. It is an automated research digest of public SEC filings.

Cerebras Systems Inc. (CBRS)

Sector: semiconductors · Tracking since 2026-08-14

What am I looking at?

Everything on this page comes from public SEC filings that name this company. The cards show the automated signal score, net insider activity (open-market buys minus sells over the last 90 days), distinct insider buyers, and watchlist institutions currently holding the stock. The timeline lists each transaction row with a link to the original filing.

insider_buy / insider_sell
An officer or director traded on the open market (Form 4). Scheduled 10b5-1 plan trades are noted and treated as low-signal.
13f_new / 13f_add / 13f_trim / 13f_exit
A watchlist fund opened, increased, reduced, or closed a position between quarterly 13F reports — these become public up to 45 days after the quarter ends.
13d_filed
An investor crossed 5% ownership with activist intent (Schedule 13D).
50
Signal score
$0
Net insider value 90d
0
Insider buyers 90d
3
Watchlist holders

Watchlist holders

Analysis

Cerebras Systems picks up three new institutional backers strong (2026-W34)

Cerebras Systems, the AI chip startup, picked up three new institutional 13F disclosures this quarter worth roughly $3.81B combined: Altimeter's single-line $1.60B stake (7.23M shares) is the largest, followed by Coatue's $1.55B position split across eight reporting lines, and Tiger Global's $662.8M stake. All three are first appearances for Cerebras in our tracking — like SpaceX, a straight three-way convergence from managers that don't typically overlap on the same name in the same quarter.

Filing timeline

FiledActorEventSharesValue ($)Source
2026-08-14coatue13f_new54,64812,077,208filing
2026-08-14coatue13f_new434,04495,923,724filing
2026-08-14coatue13f_new272,85260,300,292filing
2026-08-14coatue13f_new6,129,2421,354,562,482filing
2026-08-14coatue13f_new11,6802,581,280filing
2026-08-14coatue13f_new75,36716,656,107filing
2026-08-14coatue13f_new15,1453,347,045filing
2026-08-14coatue13f_new18,0503,989,050filing
2026-08-14altimeter13f_new7,225,0371,596,733,177filing
2026-08-14tiger-global13f_new2,999,000662,779,000filing